1. when using liquid milk for making yogurt, always at least simmer the milk. it kills ALL the possible bacteria.
2. the great enemy of yogurt are germs and bacteria. make sure that every thing is CLEAN. pans, spoon, whisk, yogurt maker, thermometer,....
3. do not taste the yogurt before it is cold.or you will never eat it again.
4. for a firmer product add 1 packet of unflavored gelatin in with the milk (or water for the dry milk) for each batch of yogurt. follow directions on gelatin package. for a creamier yogurt. add extra dry milk powder.
5. use your first starter batch (first cup of ONLY plain yogurt, WITH live cultures, such as Dannon-read the label. it it has these cultures, it will say so. read the label. for 1 month. get a new starter to begin again (with every useage the starter gets less effective.
6. i have also used flavored gelatin to make yogurt. the flavor is all through out the yogurt, not like in stirred.
7. after the yogurt is made and cooled, you will find that you can use any kind of flavoring you like-jam, jelly, pie filling, fresh fruit, veggies (shredded carrots and raisins), nuts, extracts, the list is as long as your imagination. go to the store and see what flavors they have there. these are the best ones, but not the only ones-new flavors are coming out all the time.
8. timing is very important. the longer the yogurt incubates, the more "tangy" or sour it becomes (this is a good thing).
if you have trouble remembering how long the yogurt has been incubating, put a piece of paper with the time on it near the maker when you start it.
9. there are many many good ways to use yogurt after it is made. there are whole cookbooks written on the subject. salad dressing, ice cream, substitute for sour cream, put in regular jello- like cream cheese. google it to see some other ways of using it.
10. if you have a yogurt maker, i am assuming that you got a basic recipe with it. it is important that you follow that recipe untill you are very comfortable with it. then get some yogurt cook books to branch out and experiment with.
i've had my yogurt maker since before it was fashionable (during the hippie days) and without it and my bread maker, i think we would starve.
lots of happy eating